...the Supreme Court's opinion, isssued today, in Los Angeles County Flood Control Dist. v. NRDC, No. 11-460 (Jan. 8, 2013), in which the Court held that "the flow of water from an improved portion of a navigable waterway into an unimproved portion of the very same waterway does not qualify as a discharge of pollutants under the [Clean Water Act]"
We'd summarize the case, but that would take longer than you reading the five-page opinion.
More here from Greenwire's Lawrence Hurley.